This is a very intriguing experience of Eckhart where he talks about having just helped a woman overcome her "pain body" goes to a restaurant and narrates what happens at the restaurant:

I sat down at a table and ordered a meal. There were a few other guests. At a nearby table, there was a middleaged man in a wheelchair who was just finishing his meal. He glanced at me once, briefly but intensely. A few minutes passed. Suddenly he became restless, agitated, his body began twitching. The waiter came to take his plate. The man started arguing withhim. “The food was no good. It was dreadful.” “Then why did you eat it?” asked the waiter. And that really set him off. He started shouting, became abusive. Vile words were coming out of his mouth; intense, violent hatred filled the room. One could feel that energy entering the cells of one's body looking for something to latch on to. Now he was shouting at the other guests too, but for some strange reason ignoring me completely as I sat in intense Presence. I suspected that the universal human painbody had come back to tell me, “You thought you defeated me. Look, I'm still here.” I also considered the possibility that the released energy field left behind after our session followed me to the restaurant and attached itself to the one person in whom it found a compatible vibrational frequency, that is to say, a heavy painbody. The manager opened the door, “Just leave. Just leave.” The man zoomed out in his electric wheelchair, leaving everyone stunned. One minute later he returned. His painbody wasn't finished yet. It needed more. He pushed open the door with his wheelchair, shouting obscenities. A waitress tried to stop him from coming in. He put his chair in fastforward and pinned her against the wall. Other guests jumped up and tried to pull him away. Shouting, screaming, pandemonium. A little later a policeman arrived, the man became quiet, was asked to leave and not return. The waitress fortunately was not hurt, except for bruises on her legs. When it was all over, the manager came to my table and asked me, half joking but perhaps feeling intuitively that there was some connection, “Did you cause all this?”

Show him, from your own experience, how the peculiar mental condition surrounding that first drink prevents normal functioning of the will power (Alcoholics Anonymous, Page 92)